Galatians 3. We are justified by faith, even as Abraham was justified by faith. The law brings a curse, it is impossible to keep the law. God gave the everlasting promise to Abraham before the law. “The Law was our schoolmaster to bring us unto Christ.” “For ye are all the children of God by faith in Christ Jesus. For as many of you as have been baptized into Christ have put on Christ. There is neither Jew nor Greek, there is neither bond nor free, there is neither male nor female: for ye are all one in Christ Jesus. And if ye be Christ’s, then are ye Abraham’s seed, and heirs according to the promise.“
Isaiah 36. Isaiah broke from prophecy and gave a historical rendition, duplicated in 2 Kings. This is not plagiarism, Isaiah was the scribe during Hezekiah’s reign.